Method of fabricating an intraluminal scaffold with an enlarged portion
Devices and methods for treating veins and venous conditions, such as chronic cerebrospinal venous insufficiency, are provided. In one aspect, the disclosed subject matter provides an intraluminal scaffold having a generally tubular body with a lumen defined therethrough, the tubular body having a compressed condition for delivery and an expanded condition for implant within a vessel having a distended portion, at least a length of the tubular body configured to form an enlarged portion in the expanded condition to engage a wall of the distended portion of the vessel. Methods for fabricating and using the scaffold, methods for remodeling a vein, and methods of deploying a medical device in a vessel without negatively impacting the function of a valve of the vessel, are also provided.
1. A method of fabricating an intraluminal scaffold, comprising:
providing a non-cylindrical tubular body having a substantially uniform wall thickness with a lumen defined therethrough, at least a length of the non-cylindrical tubular body having an enlarged portion;
defining a plurality of cells in the non-cylindrical tubular body to form an intraluminal scaffold capable of having a substantially cylindrical shape in a compressed condition for delivery and an expanded condition for implant within a vessel, the at least a length of the non-cylindrical tubular body having the enlarged portion when in the expanded condition.
2. The method of claim 1 , wherein providing the non-cylindrical tubular body includes extruding a generally cylindrical tube, and expanding at least a portion of the cylindrical tube to form the enlarged portion.
3. The method of claim 2 , wherein expanding at least the portion of the cylindrical tube includes blow molding to form the enlarged portion.
4. The method of claim 2 , wherein expanding at least the portion of the cylindrical tube includes hydroforming the enlarged portion.
5. The method of claim 2 , wherein the non-cylindrical tubular body is made of a polymeric material.
6. The method of claim 1 , wherein providing the non-cylindrical tubular body includes depositing tubular body material on a mandrel having a surface defining the enlarged portion.
7. The method of claim 6 , wherein the non-cylindrical tubular body material includes a metal or metal alloy.
8. The method of claim 6 , wherein defining the plurality of cells in the non-cylindrical tubular body includes depositing the tubular body material on select locations of the surface of the mandrel.
9. The method of claim 1 , wherein defining the plurality of cells in the non-cylindrical tubular body includes removing material from the tubular body.
10. The method of claim 9 , wherein removing material from the non-cylindrical tubular body includes laser cutting the non-cylindrical tubular body.
11. The method of claim 1 , wherein the plurality of cells are uniform in size and shape.
12. The method of claim 1 , wherein the plurality of cells are nonuniform in size or shape.
13. The method of claim 1 , wherein the enlarged portion of the non-cylindrical tubular body has a non-cylindrical shape.
14. The method of claim 1 , wherein the enlarged portion of the non-cylindrical tubular body has a generally bulbous shape in the expanded condition.
15. The method claim 1 , wherein the enlarged portion of the non-cylindrical tubular body defines a spiral anchor.
16. The method of claim 1 , wherein the enlarged portion of the non-cylindrical tubular body has a generally buttercup shape in the expanded condition.
17. The method of claim 1 , wherein the enlarged portion is spaced from an end of the non-cylindrical tubular body.
18. The method of claim 1 , wherein the non-cylindrical tubular body has a plurality of enlarged portions.
19. The method of claim 18 , wherein the non-cylindrical tubular body has a dumbbell shape defined by the plurality of enlarged portions when in the expanded condition.
20. The method of claim 18 , wherein the non-cylindrical tubular body has a pine cone shape defined by the plurality of enlarged portions when in the expanded condition.